Turbulent UV lidar BSE-5
I.A. Razenkov, A.I. Nadeev, N.G. Zaitsev, E.V. Gordeev
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: атмосферная турбулентность, искусственная турбулентность, увеличение обратного рассеяния, лидар, atmospheric turbulence, artificial turbulence, backscatter enhancement effect, lidar
Abstract
The UV (355 nm) eye-safe turbulent lidar BSE-5 designed for atmospheric turbulence studies is described. Lidar works on the effect of backscattering enhancement, which occurs when a light wave propagates twice in a random medium. The design of the device is based on the receiving and transmitting afocal Mersen telescope, which provides thermomechanical stability during long-term operation of the device. To reduce the size of the telescope, the edges of the main mirror were cut off, which are not used during the lidar operation. Lidar tests were conducted at Tolmachevo airport, during which the turbulence condition was continuously monitored over the runway and over the aircraft parking. The lidar confidently recorded a turbulent wake for any aircraft type during takeoff and landing. It was found that the track width is 50 m wide, and the lifetime of the intense artificial turbulent zone over the airfield is 2-3 minutes.
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